Pump



L. E. JOHNSON ET Al.

Dec. 11, 1928.

PUMP

Filed Aug. 1, 19'24 4 Sheefs-Sheet 1 Invenkbrs: Lawrence Johnson, SniusMJinnsew,

John 1". fife Tarnaham by M Dec. 11, 1928. 1,694,783

L E. JOHNSON ETAL PUMP Filed A l 1924 2 2%.? 2' 56 4 Sheets Sheet mentors: Lawrence E. Johnson, Simlu-s M Hansen, John ZZMo Tarmzhm,

Dec 11, 1928. 1,694,783-

L. E. JOHNSON ET AL PUMP Filed Au .1, 1924 4 Sheets-Sheet 3 Fig.4;

(g, /'o.' 9 J5 Lawreme E. Johnson, Sakai/us .Hansen, John c Tarnahan,

Dec. 11, 1928. 1.694.783

L. E. JOHNSON ET m.

PUMP

Filed jg 1, 1924 4 Shee'ts-Sheet 4 1g. 6. so

Inventors: Zawrerwe E. Johnsan,

M Hansen, JoMZYMcI'armhmz,

I by

Patented Dec. 11, 1928.

nsurso j STATES PATENT oFFicE. V

LAVJRENCE E. JUHNSQN, OF MELROSE, SINI'US IVI. HANSEN, OF LYNN, AND JOHN T. JiEcTARNAIE 1.1 015 BItIGZ-ITUN, MASSACHUSETTS; SAID HAIQ'SEN AND SAID JOHNSON AESTGNOFZS, BY IvTESNE ASSIGNMENTS, TO VECTOR SHQE MAGHLTNERY COMPANY, GE LYNN, IMASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

PUMP.

Application filed August 1, 1924. Serial No. 729,461.

This invention relates to compressors and has for its object tl'ieproduction of amachine of this character to which air and oil may be admitted and compressed to form a 5 mistin which condition it may be delivered to an oil burner. I

These objects are attained by the machine illustrated in the accompanying drawings.

For the purpose of illustrating. the invention, one preferred form thereof is illustrated in the drawings, this form having been ,iound to give satisfactory and reliable results although it is to be understood that the various instrumentalities of which the invention consists can be variously arranged and organized and the invention is not limited to the preciso arrangement and organization 01 these instrumentalities as herein shown and de-' scribed except as required by the scope of the 20 appended claims. y

Of the drawings: Figure 1 represents a vertical section of a compressor embodying the principles of the present invention, the cutting plane being on line 1, 1, on Fig. 2. V

Figure 2 represents a transverse section of same on line 2, 2, on Fig. 1. b

Figure 3 represents a'transverse section of same on line 3,3, on Fig. 1. I

Figure 1 represents a transverse section of same on line 4, i, on Fig. 1.

Figure 5 represents a transverse section of same on line 5, 5, on Fig. 1.. Figure 6 represents an end elevation of same. V

Figure 7 represents a transverse section on line 7, 7, on Fig. 1, and V Figure 8 is a detail and elevation showing the delivery pipe from the compressor to an oil burner.

Similar characters indicate like parts throughout the several figures of the drawings.

Inthe drawings, 10 is a casing having chambers 11, 12 therein, the outer ends of which are closed by the end plates 13 and 14 respectively. p The end plate 13 hasan outwardly extending hub 15 having a bearing therein for the revoluble shaft 16 which extends through hearings in the casinglO with its opposite end disposed in a bearing in the end plate 14. g

This opposite end of the shaft 16 has are ducedend 17 to which is keyed a disk or piston 18 rotatable with said shaft 16 in the chamber 19 formed in the hub, 20 of the end plate 1%. i

The chamber 19-is closed by a cap 21 secured to the end of hub 20 by screws 22 and having thereon a boss 23 to which is threaded one end of an oil supply pipe 24 com1nunicating with one end oi passage 25, the opposite end of which communicates with the chamber 19 througha port 26 which is wide at one end and gradually tapers to a. point where the passage communicates therewith. R v

The chamber 19 on its inner face hasn similarly shaped outlet port 27 leading therefrom, the thinner end of which connnunicates with a passage 28 in the hub 20. r

A pipe 29 leads from the outer end of passage 28 to a by-pas's valve 30 which may be o1" any well known construction.

From this valve 30 extends a pipe 31 to th source of oil supply and another pipe 32 extends to a passage 33 surrounding the chamber 12. The passage 33 communicates through the port 34 (Figs. 3 and 1) withone end of a similar passage 35 surrounding the chamber 11. p

The opposite end of the passage 35 communicates with one end of a pipe 36,,the opposite end of which communicates with a passage 37 leading to a recess 38 beneath the shaft 16 and extending to the chamber 12.

The pipe 36 has a branch pipe 39 extending to the passage 40 the opposite end of which communicates with a recess 41 beneath the shaft 16, which recess communicates with the chamber 11'. I 1

The shaft 16 is eccent-rically disposed with in the chambers 11, '12, and secured thereto and revoluble therewith are the oppositely disposed pistons 12 and 13, the former being positioned in chamber 11 and the latter in chamber 12. Each of these pistons has a plurality of cylindrical pockets n extending parallel to and offset from the axis of the shaft and located inwardly from the pressure side. In clined slots 4:5 extend from end to end of each piston. I

Each slot d5 has a blade 46 therein and the l pass a pressure port 52,

inner end of each slot 45 has passages 74 extending therefrom to one of the pockets 1% so that the material under compression within said pockets may pass through said passages l7 and force the blades 46 outwardly with their outer ends in contact with the cylindrical wall of said chambers'll and 12.

lhe chamber 11 has an inlet port 48 (Fig. 3) through which air is admittet to said chamber from any suita le source of supply through the pipe l9.

From the same source of air supply a pipe leading to the port 51 admits air to the chamber 12.

The pistons 12, 13 and 18 revolve in the direction of the arrow at on Figs. 3, 5, and '2'.

As the pistons d2, as revolve the air in the chambers 11, 12 will be compressed and while under con'ipression will be ejected from said chambers 11, 12 through the pressure ports 52 and 53 respectively, the port 52 communicating with the delivery pipe 5i and the port 53 communicating with the delivery pipe 55.

Both pipes 5d and connect with the pipe 56 leading to an oil burner.

The pistons 42, 13 are always in contact at one point with the cylindrical wall of the chambers 11, 12 and the inlet ports l8, 51 and discharge ports 52, 53 are uncovered at all times. 3

These ports are all wider atone end and tapered towards the opposite end, and air will be admitted to a chamber 11 or 12 in advance of a blade 16 and as the blade advances the air pocketed between it and the preceding blade will be compressed in the space between the pistons as, 13 and the cylindrical wall of the chambers 11, 12.

Vi hen one of the blades l6 commences to 53 the compressed air behind it and in front of a succeeding blade will be ejected through said delivery ports in gradually decreasin quantities owto the tapered shape of said ports.

The piston 18 of the oil pump is constructed in a manner similar to the construction of the pistons 12, 13 and as the piston 18 rotates the oil admitted to the chamber 19 will be forced into the pipes 29, 32 and then through the passages 33, 35 and from the passage 35 through pipes 36, 39 to the recesses 38, 41 where it will lubricate the shaft 16 and its bearings.

The pistons 42, 43 are not so closely fitter within the chambers 11, 12 but that portions of the oil within the recesses 38, 41 will leak into the chambers 12, 11 and mix with the air being compressed in said chambers.

{lnly a small proportion of oil is used as for instance 1% of oil to 500% of air.

hen the air and oil have been thoroughly mixed and the mixture compressed it will be in the form of a very line mist and when in this condition and being discharged through the pipe 56 into an oil burner it will be very combustible.

Obviously this makes a very economical fuel for use in oil burners.

In the rotation of the pistons 18, 42 and 43, the blades are so disposed that each in moving away from an intake port creates a vacuum in the piston chamber causing material (oil or air) to be drawn into the chambers 19, 11 and 12, which material will be compressed by the forward movement of the next succeeding blade after it has passed said ii.- take port and then under pressure t iis materail will be ejected through the outlet port;

The dcvic is very compact and the wearing surfaces are reduced to a minimum with the resultthat said device will last indefinitely. it will be noted that the oil pumped into toe air chambers not only passes around said chambers in the passages 33, 35 and tends to keep the chambers from over-heating, and lubricates the bearings and movable elements but also forces the blades 46 outwardly into contact with the cylindrical walls of the air chambers. This oil having performed these functions is then mixed with the air in the chambers 11, 12 and compressed to such an extent that the mixture forms a highly inflammable mixture particularly adapted for use in oil burners and the like.

It is absolutely noiseless which is an advantage particularly desirable in the heating systems of private homes.

[is the oil in the pockets 14; passing through the openings 47 into the pockets 15 move the blades 16 outwardly the use of springs for this purpose is made unnecessary.

Without further description, it is believed that the operation and many advantages of the invention will be fully apparent. 7

Having thus described our invention, we claim:

1. in a compressor, the combination of a cylindrical chamber; a revoluble shaft; a piston in said chamber on said shaftand havin slots therein and pockets parallel with anu offsetfrom the axis of said shaft and extending inwardly from one end thereof; blades in said slots; means for admitting material to said chamber and through holes extending to the inner ends of said slots from said pockets and against the inner ends of said blades to force said blades outwardly.

2'. lln a comorcssor, the combination of a cylindrical chamber; a 'revoluble shaft eccentrically disposed therein; a piston thereon within said chamber contacting with the cylindrical wall thereof at one point only; compressing mechanism carried by said piston; an inlet port at one end of said chamber on one side of said contacting point; and an out let port at the opposite end of said chamber on the opposite side of said contacting point.

3. In a compressor, the combination of a aaaagaa cylindrical chamber; a re'volu ole shaft eccentr'xcaXXy disposed therein, a piston thereon Within said chamber contacting With the cylindrical Wall thereof at one point only; compressing mechanism carried by said piston; an inlet port at one end of said chamber on one side of said contacting point; and an outlet port at the opposite end of said chamber on the opposite side of said contacting point, said ports having their greatest Width at the bottom and gradually decreasing in Width to their upper ends.

4. In a compressor, the combination or" two cylindrical chambers; a revoluble shaft eccen- Jrically disposed therein; pistons on said shaft Within said chambers contacting at one point only with the cylindrical Wallsot' said chambers; movable blades in slots formed in. said pistons, the blades of one piston being oppositely disposed relatively to the blades of the other piston; means for admit-ting air to both chambers at one end thereof; and means for discharging compressed air at the opposite ends of said chambers.

5. In a compressor, the combination of a casing having two cylindrical chambers; a shaft extending through and located eccentrically in relation to said chambers; pistons fast on said shaft in said chambers; said pistons having slots therein, and pockets offset from the axis of the shaft, communicating With said slots and extending to ends of said pistons; blades in said slots; passage in the casing leading to the chambers and means for forcing liquid through said passages and into said pockets, thereby to press the blades out- Wardly against the surfaces of the chambers.

Signed by us at Lynn, Mass, thisQ Lth day of July, 19:24. I

LAWRENCE E. JOHNSON. SINIUS M. HANSEN. JOHN T. MGTARNAHAN. 

